Friction draft-rigging.



Patented Aug. 2, 1910.

2 SHEETS-SHIIET 1;

J. P. OUONNOR.

FRICTION DRAFT RIGGING.

APPLICATION FILED JULY 30, 1909.

J, F. OGO NNOR.

FRIGTION DRAFT RIGGING.

APPLIUATION FILED JULY 30,1909.

Patented Aug. 2; 1910.

2 SHEETS-SHEET 2.

17550 rrzqgcs "spring is UNITED STATES PATIEN T OFFICE;

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, 'ASSIGNOR, BY MESNE ASSIGNMENTS, TO

WILLIAM H. MINER, OF CHICAGO, ILLINOIS.

FRICTION DRAFT-RIGGING.

To all whom it may concern:

Be it known that I, JOHN F. OConrzon, a citizen .of the United States, residing in Ghi cago, in the county of Cook and State of Illinois-,have invented a new and useful Improvement in Friction Draft-Rigging, of which the following is a specification.

My invention relates to improvements in friction draft rigging for railway cars.

Herctofore in friction draft rigging of the kind to w lg ich my invention particularly relates, andli iercin longitudinally arranged s at one end against a longitudinally movable friction shell, and at the other end against segmental friction shoes within the friction-shell, the shoes beingfipread apart by a wedg'e with anti-friction rollers interposed between the wedge and the friction shoes, sometimes the grip-like pressure of the spring against the ends of the segmental friction shoes tends to prevent the inner ends of the friction shoes from properly moving outward under the spreading action of the wedge and rollers, thus producing an unequal bearing of the friction shoes against the friction shell from end to end of the shoes and consequent defective operation.

The object of my present invention is to remedy-this dillicnlty or objection, which I do, and herein my invention consists, by providing the friction shoes with bearing shoulders near their middle, and inter-posing between the friction shoes and the adjacent end of the sjin'ing a spring-seat cap or disk furnished with. a plurality of supporting arms or extensio 13 which engage the shoul ders on the friction shoes and thus support the same at their center or middle. Since the thrust or pressure of the spring against the friction shoes thus comes at the central -or middle portion ofthe shoes instead of against the ends thereof as heretofore. it thereby leaves the inner ends of the shoes free to move outward under the spreading action of the wedge and rollers (which also bear against the center or middle portion of the shoes) and entirely overcomes all binding tendency of the spring at the inner ends l Specification of Letters Patent.

Application filed July 30, 1909.

Patented Aug. 2, 1910. Serial No. 510,359.

nre thereof to further insure freedom of out ward radial movement of the friction shoes to the slight extent necessary, so that the shoulders of the shoes will not be required to slide radially in respect to the inner ends of the fingers abutting against said shoulders.

My invention further consists in the novel construction of parts and devices and inthe novel combinations of parts and devices herein shown and described.

In the accompanying drawing forming a part of this specification, Figure 1 is a side elevation, partly in longitudinal section, of a friction draftv rigging embodying my invention. Fig. 2 is a plan view, partly in horizontal section. Fig. 3 is a cross section on line 3-3 of Fig. l.- Fig. st is a detail front elevation of the friction shell. Fig. 5 is a detail rear end view of the friction shell and adjacent parts. the Wedge. Fig. 7 is a detail cross section of the friction shell showing the rear ends of the friction shoes in elevation. Fig. 8 is a detail 'end view of the spring seat or cap which is interposed between the friction shoes and the spring; and Fig. 9 is a detail elevation of one. of the friction shoes showing the inner side thereof.

In the drawing, 'A represents the draft sills or members of the car frame to which the draft rigging is applied, the same being preferably center sills. B the draw-bar, B" the draft yoke, C the draft lugs or stop members secured to the draft sills, D D front and rear followers and E E the springs.

F is a longitudinally movable friction shell interposed between the followers and having an internal cylindric friction face G are segmental friction shoes )referabl t v 7 l shoes. The friction shoes G each have a seat or shoulder to keep the'rollers in place and the Wedge H is provided with 00- Fig. 6 is a plan view of I in the friction shell.

operating shoulders 70, and the shoes have also shoulders g to keep the rollers 1n place lengthwise.

The segmental friction shoes Gr are preferably each an'obliquc segment of'a cylinder so that their parallel meeting edges 9" g extendv at an angle instead of parallel to the axis of the cylinder. 'This prevents unevenness of wear of the friction shell at the meeting edges of the segments as the segments'reciprocate longitudinally lhe antbfrction rollers H .the center or middle ortion of the friction shoes G so, that the t rust of the w edgmH and rollers H comes centrally against the shoes. The segmental friction shoes G are "each prdvidedwith a centralbearing shoul- 'derlg on the inner face thereof, closely ad jacent' to the inclined or wedge face 9 there'- of against which the centrally bearin roller fl 'acts, andagainst which central caring shoulders g the thrust orpressure ,of the spring E comes and is transmittedtothe friction shoe. Each of the friction shoes I time .i receives both the thrust of the drawbar thrpugh the wedge and antifriction roller andthe thrust or pressure of the ringat its central or middle, portion. o 'transmit the thrust or pressure of the spring E against the central ormiddle portlon of each of the friction shoes,. I rovide and-interpose between the inner en of the gpring and the friction shoes a spring-seat sh or cap G which is furnished with :1 p111 rality of thin, wide supportin arms or hearing fingers g oneof which cars at its inner end against the shoulderg of each of the friction shoes G The spring-seat or cap G? may preferably have an inner bevel face g and the inner ends of the shoesCr and wide, as illustrated in the drawing, they are adapted also to have a slight flexure radially to accommodate the very slight out ward or radial movement of the friction shoes, thus rendering it unnecessary for the shoulders of the friction shoes to slide against the inner ends of the supporting arms 9. a

K is the connecting rod which serves to holdall the parts assembled and the sprin under an initial tension or compression. ts headK preferably bears against the wedge bear against a moveibly secured to the draft sills by 1. n a friction draft rigging, the combination with a friction shell, of friction shoes coacting therewith, a Wedge for spreading said shoes, an opposing sprin reacting at 'one end against said shoes and at the other end against said shell and pressure transmitting members acting centrally against the shoes for causing the opposing pressures of the wedge and spring to be exerted against the middle portions only of the shoes, substantially as specified.

2. In a friction draft rigging, the combination with a friction shell, of friction shoes within the shell, a wedge, and anti-friction rollers acting centrally against the friction shoes, and a principal spring reacting at one end a gainst the friction shell and at its other end centrally against the friction shoes, sub stantially as specified.

3. In a friction draft rigging, the cornbrn'ation with a friction shell, of friction shoes within the shell, a Wedge, and anti-fr ct on rollers acting centrally against the friction shoes, and a s ring reacting at one end against the frictlon shell and at its other end centrally against the friction shoes, said friction shoes having central bearing shouiders and said sprin *seat' having supporting arms engaging sai central bearing shoulders of the friction shoes, substantially as specified.

4. In a nation witha friction shell, of frict on shoes within the shell, a wedge, and anti-fr ct on rollers acting centrally against the frictlon shoes, and a is ring reacting at one end against the friction shell and at Its other end centrally. against the friction shoes, said friction shoes having central bearing shoultiers and said spring-seat having supportlng arms engaging sai central bearing shoulders' ofthe friction shoes, said supporting arms being relatively thin and wide to adapt themsfor slight fiexure under strain, substantially as specified.

JOHN F. ooonnon.

Witnesses:

H. M. MUNDAY, EDMUND Anooox.

friction draft rigging, the combi 

